Seedling emergence and summer survival after direct seeding for woodland restoration on old fields in south-western Australia

2014 ◽  
Vol 15 (2) ◽  
pp. 140-146 ◽  
Author(s):  
Lauren M. Hallett ◽  
Rachel J. Standish ◽  
Justin Jonson ◽  
Richard J. Hobbs
Keyword(s):  
Western Australia ◽  
Seedling Emergence ◽  
Direct Seeding ◽  
Old Fields ◽  
Woodland Restoration

Direct seeding of PinusSylvestris using microsite preparation and invigorated seed lots of different quality: 2-year results

1994 ◽  
Vol 24 (1) ◽  
pp. 77-86 ◽  
Author(s):  
Hans Winsa ◽  
Urban Bergsten
Keyword(s):  
Seed Quality ◽  
Seedling Survival ◽  
Seedling Emergence ◽  
Mineral Soil ◽  
Direct Seeding ◽  
Growing Seasons ◽  
Humus Layer ◽  
Negative Effect ◽  
Mean Germination Time ◽  
Better Than

Direct seeding of Pinussylvestris L. is a regeneration method, with potential for development considering scarification, microsite preparation, seed invigoration, and seed quality. Three seed lots of different quality concerning seed weight, germination percent, and mean germination time were used on two sites in northern Sweden. Microsite preparation, 2 cm deep pyramidal indentations, of the mineral soil improved seedling emergence on the two sites by 48 and 62%, respectively, compared with seeding without preparation other than removal of the humus layer. Microsite preparation in combination with invigorated seed, i.e., seed incubated at 30% moisture content for 7 days at 15 °C, resulted in seedling emergence of about 85% for the highest and about 50% for the lowest seed quality at both sites. Noninvigorated seed, seeded without microsite preparation, reached about 55% for the highest and 22% at one and 43% at the other for the lowest seed quality. Without microsite preparation there was no, or a negative, effect of seed invigoration on seedling emergence. Seedling survival after the first winter improved significantly with better seed quality. Survival averaged 92 and 72% at the two sites, with frost heaving causing most mortality. Seedlings from invigorated and redried seed survived better than seedlings from untreated seed. Seedlings from the best seed quality had higher values in seedling height, about 35%, shoot length, about 60%, and needle length, about 30%, after two growing seasons than seedlings from lower seed qualities. Invigoration and microsite preparation had no effect on measured growth characteristics.

scholarly journals Impacts of bracteole removal and seeding rate on seedling emergence of halophyte shrubs: implications for rangeland rehabilitation in arid environments

2019 ◽  
Vol 41 (1) ◽  
pp. 33
Author(s):  
Mounir Louhaichi ◽  
Sawsan Hassan ◽  
Ali Mekki Missaoui ◽  
Serkan Ates ◽  
Steven L. Petersen ◽  
...  
Keyword(s):  
Seed Treatment ◽  
Nutritive Value ◽  
Block Design ◽  
Seedling Emergence ◽  
Direct Seeding ◽  
Arid Environments ◽  
Seeding Rate ◽  
Seed Processing ◽  
Processing Techniques ◽  
Positive Effect

Direct seeding techniques often result in unsatisfactory outcomes in rangeland rehabilitation, primarily because of low seedling emergence and poor establishment. Seed processing techniques aimed at improving seedling emergence have gained interest by pasture managers. The purpose of this study was to investigate the combined effects of bracteole removal and seeding rate on seedling emergence in seven halophytic species: Atriplex halimus, A. canescens, A. leucoclada, A. nummularia, A. lentiformis, Salsola vermiculata and Haloxylon aphyllum under semi-arid conditions in Tel Hadya (Syria). Each of these species was evaluated for seedling emergence under two seed treatments (bracteoles removed and non-removed bracteoles) with three seeding rates (10, 30 and 60 seeds per pot), in a completely randomised block design. The results showed a positive effect of seed treatment on seedling emergence for all studied species. The native A. halimus had the highest emergence percentages whereas the introduced A. mummularia, had the lowest. However, there were no significant effects of seeding rates on seedling emergence. These results showed that bracteole removal could improve germination and seedling emergence, and potentially increase the rate of establishment of the species studied. Therefore, when implementing rangeland rehabilitation projects, bracteole removal needs to be considered. The native S. vermiculata should be recommended for direct seeding in the West Asia and North Africa region given its high seedling emergence, known high palatability, nutritive value, and high auto-regeneration performance.

Effect of ryegrass root residues, knockdown herbicides, and fungicides on the emergence of barley in sandy soils

1987 ◽  
Vol 27 (6) ◽  
pp. 785 ◽  
Author(s):  
WM Blowes
Keyword(s):  
Western Australia ◽  
Methyl Bromide ◽  
Seedling Emergence ◽  
Sandy Soils ◽  
Soil Fumigation ◽  
Soil Drench ◽  
Pot Experiments ◽  
Seed Dressing ◽  
Winter Crops ◽  
Possible Cause

Poor seedling emergence of 30 000 ha of winter crops occurred in Western Australia in 1984 after herbicides were used to kill weeds prior to sowing. In pot experiments to determine the possible cause(s), the emergence of barley seedlings was reduced by the presence of both herbicide treated and untreated ryegrass root residues in the soil. Fumigation of the soil with methy1 bromide or the application of a fungicide soil drench restored seedling emergence in the presence of ryegrass root residues, but benomyl drench was less effective than methyl bromide fumigant or furalaxyl soil drench. The effects of the residue, fumigant and furalaxyl were consistent in the 3 soils used but soif type affected the severity of the problem. In the presence of ryegrass root residues, Pythim species colonised the large roots and subsurface hypocotyl of barley seedlings. Metalaxyl seed dressing reduced the colonisation of barley seedlings by Pythim species and restored seedling emergence.

Topsoil Handling and Storage Effects on Woodland Restoration in Western Australia

2000 ◽  
Vol 8 (2) ◽  
pp. 196-208 ◽  
Author(s):  
Deanna P. Rokich ◽  
Kingsley W. Dixon ◽  
K. Sivasithamparam ◽  
Kathy A. Meney
Keyword(s):  
Western Australia ◽  
Storage Effects ◽  
Woodland Restoration ◽  
And Storage

Seed dormancy, soil type and protective shelters influence seedling emergence at Shark Bay, Western Australia: Insight into global dryland revegetation

2017 ◽  
Vol 18 (2) ◽  
pp. 156-163 ◽  
Author(s):  
Charles Ellery Mayence ◽  
Peter J. Carrick ◽  
Dale Van Beem ◽  
Eefje Broenland ◽  
Kingsley W. Dixon
Keyword(s):  
Seed Dormancy ◽  
Western Australia ◽  
Soil Type ◽  
Seedling Emergence ◽  
Shark Bay ◽  
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